spiny sowthistle USDA PLANTS Symbol: SOAS
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Sonchus asper (L.) Hill

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Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae
Synonym(s): perennial sowthistle, prickly sowthistle, spiny-leaf sow-thistle
Native Range: Africa, Asia, Europe ()

Selected Images from Invasive.orgView All Images at Invasive.org


Flower(s); May. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society.
James H. Miller, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Bruce Ackley, The Ohio State University, Bugwood.org
Additional Resolutions & Image Usage

Seed(s);
Mary Ellen (Mel) Harte, , Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Chris Evans, Illinois Wildlife Action Plan, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); April. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society.
James H. Miller & Ted Bodner, Southern Weed Science Society, Bugwood.org
Additional Resolutions & Image Usage

Foliage; S. asper on left, S. oleraceus on right
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Catherine Herms, The Ohio State University, Bugwood.org
Additional Resolutions & Image Usage

Foliage; Sonchus oleraceus on the left and S. asper on the right.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

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U.S. National Parks where reported invasive:
Chiricahua National Monument (Arizona)
Death Valley National Park (California)
Grand Canyon National Park (Arizona)
Haleakala National Park (Hawaii)
Yellowstone National Park (Wyoming)



Invasive Listing Sources:
Georgia Exotic Pest Plant Council
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007